FILING AGREEMENT DATED TO BE EFFECTIVE MAY 27, 2008 REGARDING JOINT FILING OF SCHEDULE 13D

EXHIBIT EE

FILING AGREEMENT DATED TO BE EFFECTIVE MAY 27, 2008
REGARDING JOINT FILING OF SCHEDULE 13D

The undersigned hereby agree that:

(i) Each is eligible to use the Schedule 13D attached hereto;

(ii) The attached Schedule 13D is filed on behalf of each of the undersigned; and

(iii) Each of the undersigned is responsible for the timely filing of such Schedule 13D and any amendments thereto, and for the completeness and accuracy of the information therein concerning itself; but none of them is responsible for the completeness and accuracy if the information concerning the other persons making the filing, unless it knows or has reason to believe that such information is inaccurate.

Sentient USA Resources Fund, L.P.				Sentient Global Resources Trust No. 1
By:		Sentient Executive MLP1, Limited,		By:	Sentient (Aust) Pty. Limited,
		General Partner				As Trustee
By:		/s/ Xxxx Xxxxxxx		By:		/s/ Xxxxx Xxxxxxx
		Xxxx Xxxxxxx, Director				Xxxxx Xxxxxxx, Director
Date:		June 6, 2008		Date:		June 6, 2008
Sentient Executive MLP1, Limited,				Sentient (Aust) Pty. Limited
By:		/s/ Xxxx Xxxxxxx		By:		/s/ Xxxxx Xxxxxxx
		Xxxx Xxxxxxx, Director				Xxxxx Xxxxxxx, Director
Date:		June 6, 2008		Date:		June 6, 2008
Sentient Global Resources Fund I, L.P.				MGH Limited
By:		Sentient GP I, L.P., General Partner
By:		Sentient Executive GP I, Limited,
		General Partner
By:		/s/ Xxxx Xxxxxxx		By:		/s/ Xxxxx Xxxxxxx
		Xxxx Xxxxxxx, Director				Xxxxx Xxxxxxx, Director
Date:		June 6, 2008		Date:		June 6, 2008

Filing Agreement - June 6, 2008

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Sentient GP I, L.P
By:		Sentient Executive GP I, Limited,
		General Partner
By:		/s/ Xxxx Xxxxxxx Xxxx Xxxxxxx
		Xxxx Xxxxxxx Xxxx Xxxxxxx, Director
Date:		June 6, 2008
Sentient Executive GP I, Limited
By:		/s/ Xxxx Xxxxxxx
		Xxxx Xxxxxxx, Director
Date:		June 6, 2008
Sentient USA Resources Fund II, L.P.				Sentient Global Resources Fund II, L.P.
By:		Sentient Executive MLP1, Limited,		By:		Sentient XX XX, L.P., General Partner
		General Partner		By:		Sentient Executive XX XX, Limited,
						General Partner
By:		/s/ Xxxx Xxxxxxx		By:		/s/ Xxxxx Xxxxxxx
		Xxxx Xxxxxxx, Director				Xxxxx Xxxxxxx, Director
Date:		June 6, 2008				Date: June 6, 2008
Sentient Global Resources Trust II				Sentient XX XX, L.P.
By:		Sentient Executive XX XX, Limited, as		By:		Sentient Executive XX XX, Limited,
		custodian for the Trustee				General Partner
By:		/s/ Xxxxx Xxxxxxx		By:		/s/ Xxxxx Xxxxxxx
		Xxxxx Xxxxxxx, Director				Xxxxx Xxxxxxx, Director
Date:		June 6, 2008		Date:		June 6, 2008
Sentient Executive XX XX, Limited
By:		/s/ Xxxxx Xxxxxxx
		Xxxxx Xxxxxxx, Director
Date:		June 6, 2008

Filing Agreement - June 6, 2008

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